.060" Carbide End Mill = broken after second pass =HELP

[Janderso]

Made some more progress. Still waiting for the dovetail cutter.
Tomorrow I’ll drill and tap for the .020” spring steel sheet for the fine adjustment.
You get the idea.

Rain wind and more rain. Love it!

 

[ErichKeane]

Turned out great, nicely done!

 

[Janderso]

Your slitting saw got got.

For hobby, slow it way down.

Use oil can to apply oil.

Speed kills tooling.

Small carbide requires too much speed, you could put in a hand piece fixed in the mill, they call it a speeder.

But too expensive to play.

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I was at 200 rpm for the last slitting saw operation. I used a soluable oil coolant.